I fell asleep but woke up in the middle of the night. My stomach turned upside down and I could not hold myself anymore. I needed to vomit and ran to the bathroom. This occurred three times.The intolerance between them rose. The Dutch population feared assaults by their neighbors and thus kept away from personal contact with anybody who was not Dutch. Clearly this issue disappeared.On the way we visited many small hill tribe villages. The walk was through green, wet rice fields. We really enjoyed it. Our guide explained us about the region and taught us some Vietnamese.